Electric controlling device



April 12, 1932. s, H, LIBER 1,854,049

ELECTRIC CONTROLLING DEVICE Filed July 26, 1929 jig, 1.

' ways Patented Apr. 12, 1932 PATENT QFEE EQE SOSTHENE HENRI LIBER, OF PARIS, FRANCE ELECTRIC CONTROLLING DEVICE Application filed July 26, 1929, Serial No.

Filing devices are in use in which the set of filing cases forms a movable carriage which may travel in both directions upon rails mountedlon a stationary frame. The said carriage may thus present before the operators stationary outfit the various filing cases which it contains Inversely, it has been proposed to mount the operators outfit upon rails so that it will be movable before the filing device, which is now in the fixed position. In these cases the filing device and the operators outfit may thus be given alternate relative movements.

The present invention relates to a controlling arrangement for the obtainment of such relative displacements, and for the control of their direction and extent, by electric means. For this purpose, the electric motor, which by means of a suitable driving device may effect the displacement of one of the movable apparatus, has its circuit controlled by a double switch for reversing and breaking the circuit. The circuit is further controlled by switches adapted to stop the motor if for any reason the circuit has not been broken when the movable apparatus attains the end of its travel.

In the accompanying drawings and by way of example:

Fig. 1 is a diagram of the electric circuits.

Fig. 2 shows the reversing switch partly in vertical section and partly in elevation, wi d1 the cover removed.

Fig. 3 shows one of the switches used at the end of the travel partly in vertical section and partly in elevation, with the cover removed.

The apparatus controlling the circuit will be first described before indicating their connections.

A..Switc7zag dem'ce.'The said device comprises two pivoted contact elements 1-2. Said elements consist each of a sealed glass tube of curved shape carrying upon its convex part projections 456 or 456 to which are attached conducting wires. One projection is midway between the two others. The said tube contains mercury. The vol ume of the mercury is such that it may connect the wires of either end projection with the central projection when'the tube is tilted.

381,377, and in France January 29, 1929.

These circuits are broken when the tube is brought into the position in which the middle projection is vertical.

Each of said tubes is mounted on a strap 7 secured to bosses 8 laterally projecting at the 65 lower part of each vertical face of a controlling knob. The horizontal axle of the angular displacements of said knob 9 is mounted in two parallel cheeks 10 which cross-connect the two sides 11 and the top part 12 of the casing containing the mechanism. The top 12 forms a flat base, and it is apertured at 13 for the insertion of a part of the lateral surface of the knob 9. This part is suitably faced in such manner that it (55 may be controlled. On the sides 11 of the casing are mounted the electric terminals to be connected in the circuit.

In the upper part of the knob or disk 9 is formed a semi-circular slot l-l which is symmetrical with reference to the vertical plane containing the middle projections 55 of the two tubes 12; in this plane is disposed a stop 15 which is mounted on the plates 10 and extends through said slot. In this latter are mounted two springs 16 which abut respectively against the stop 15 and one end of the slot, and thus the said springs will urge the tubes 1-2 into the middle position as shown, each time that the disk 9 is turned in one or the other direction, according to the arrows m or y.

B.Swz'tc7z operated at the end of the st1"o7ce.Each of these switches consists of a straight glass tube 17 which is properly sealed and comprises two projections 18-19 or 1819 for the contact wires. The said tube may be turned about, and it contains mercury which may be used to join the said contact wires or may leave them separate, and for this purpose the frame 20 supporting the tube 17 is mounted on one side of a disk 21 which is rotatable in a bore formed in the main plate 22. In said bore is a notch 23 cooperating with an abutment stud 24 mounted on the periphery of the disk 21; in the lateral face of the said disk are formed two recesses 25 cooperating with a fastening member consisting of a ball 26 urged by a spring 27. The engagement of said ball in \positions as shown.

one or the other recess, in combination with the stud 24, movable in the slot 23, determines the two positions which may be occupied by the disk 21. V

The horizontal plane passing through the center of the ball 26 is preferably situated above the horizontal plane containing the axis of rotation of the disk 21, so that the spring 27 may produce a couple tending to complete the rotation of the disk 21 when it has cleared the middle position. The shaft of the disk turns in the back part of the bore in the main plate 22, which forms a cheek, and is provided with a lever 28 having two stops 29-30. Each step may come upon the path of the movable carriage 31, and the switching tube 17 is thusstopped in one or the other of its oblique positions. The said bore in the plate 22 is closed by a cover.

0.EZect ric 0utfit-The switches bb are mounted on the respective sides of the guiding track of the movable carriage, so that the latter will engage with a switch when at the end of its movement. The reversing switch a is within reach of the operator.

One wire 33 of the supply circuit is connected to the fields 34 of the motor and leads to the middle projection 5 of the tube 2 of the reversing switch a. The other wire 34 of this circuit leads to the central projection 5 of .thetube 1 of the said reversing switch a.

To one brush of the armature 35 is connected a wire 36 which is also connected to the projection 6' of the tube 2 and to the projection 18' of the switch I); the other projection 19' of the switch I) is connected electrically to the projection 4 of the tube 1 of the reversing switch a.

The other brush of the armature 35 is connected by the wire37 to the projection 4 of the tube 2 of the reversing switch a and also to the projection 19" of the switch I), and

the projection 18 of the switch I) is connected to the projection 6 ot the tube 1 ofthe reversin switch a.

In Figure 1, the carriage 31 is'supposed to be in the stationary position. The reversing-switch a; is in its middle position for breaking the circuit. The switchesb used at the end of the motion have the circuit-closing When the carriage is to bedisplaced,'the operator rocking'the knob 9to turnthe reversingswitch a: in:thedirection of the arrow :0 orthe arrow y, according to the direction in which the carriage is to be moved. One

or the other of the switches 1-2 will thus close the circuit in the proper direction. When the knob is released, the tubes 1-2 are brought bythe springs 16 into the eircuitbreaking position, thus stopping the motor and the carriage or other movable device.

If for any reason the carriage attains the end of its movement and the electric motor continues to operate, the carriagewill meet the corresponding stop 29, thus moving the lever 28; the switch tube 17 is accordingly operated, thus breaking the motor circuit. By acting upon the reversing switch a in order to bring back the carriage, the latter will place the switch I) in its normal closing position, since it turns the corresponding .lever by making contact with the stop 30.

I claim:

1. A switch comprising a support, a disk -mounted on thesupport and having a concentric arcuate slot, a stop secured on the support and passing through said slot midway the ends thereof, expansion springs housed in said slot between the ends of the same and said step, and a double mercury switch mounted concentrically upon the disk.

2. A switch mechanism for controllinga movable object, said mechanism comprising a rockable disk, a mercury switch tube mounted on one side of the disk, and a lever member mounted on the opposite side ofthe disk and projecting radially beyond the disk and having its outer end provided withspaced shoulders extending into the path of the movable object.

3. A switch mechanism for controllinga movable object, said mechanism comprising a casing having a bore therethrough and'provided with a circumferentially extendingrecess in the wall of the bore, a disk rotatably fitted in the boreot the casing, a projection on the edge of the disk playing in said recess, means in the casing engaging the periphery of the disk for yieldably holding the disk in a set position, a mercury switch tube mounted on one side of the disk, and alever secured on the opposite side of the disloand projecting radially beyond the diskand provided on its outer end with spacedshoulders in the path of the movable object.

In testimony whereof I ailix my signature.

sosTHENE HENRI LIBER. 

